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  1. Hadoop HDFS
  2. HDFS-13223

Reduce DiffListBySkipList memory usage

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Details

    • Improvement
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • None
    • 3.1.0
    • snapshots
    • None
    • Reviewed

    Description

      There are several ways to reduce memory footprint of DiffListBySkipList.

      • Move maxSkipLevels and skipInterval to DirectoryDiffListFactory.
      • Use an array for skipDiffList instead of List.
      • Do not store the level 0 element in skipDiffList.
      • Do not create new ChildrenDiff for the same value.

      Attachments

        1. HDFS-13223.004_commit.patch
          26 kB
          Tsz-wo Sze
        2. HDFS-13223.004.patch
          26 kB
          Shashikant Banerjee
        3. HDFS-13223.003.patch
          26 kB
          Shashikant Banerjee
        4. HDFS-13223.002.patch
          18 kB
          Shashikant Banerjee
        5. HDFS-13223.001.patch
          18 kB
          Shashikant Banerjee

        Issue Links

          is a child of

          Bug - A problem which impairs or prevents the functions of the product. HDFS-11225 NameNode crashed because deleteSnapshot held FSNamesystem lock too long

          • Critical - Crashes, loss of data, severe memory leak.
          • Resolved

          Activity

            People

              shashikant Shashikant Banerjee
              szetszwo Tsz-wo Sze
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              Dates

                Created:
                Updated:
                Resolved: